Chaff cutter



A. SCHMIDT I CHAFF CUTTER Aug. 19. 1930.

Filed July 12. 1927 2 Sheets-Sheet 1 ADALBERT SCHMIDT NV E N TOR Aug. 19,1930. A. SCHMIDT 1,773,499

CHAFF CUTTER Filed July 12. 1927 2 Sheets-Shoot 2 ADALBERT SCHMIDT INVENTOR I Patented Aug. 19,. 1959 crimes eee'eif;

applicatiennled ru l 'ie, 192?,Seiial No} 5 a, are;see -my 15, 1926.;

' "My inventionre'lates to chail cutters. I

In the hitherto known chalf' cutters ofthe drum and wheel type it is impossible to rem'ove'or introduce the upper and lower roller 6 unit, if e. the upper; and lower shaft together with the rollers and gear wheels, from or into the machine without first removing some" screws or other fastening members. i

i The b ectofmy-inventionls toenableithe I0 removal oriinsertion of the upper and lower roller units from: orinto' chaff cutters with-l 'out the necessity ofrmanipulating any fastening' orafixing members. I attain this ob} ject' substantially by making provisionsthat ina system, whi'chconsists of aflOading deits istrokeythe load and the limiting means may be. removed without manipulating any attaching members: 1 j' is f, V This possibility of the free and unrestricte edremovalof the :roller'unitshas the advantageithat in case of the feed channel becom- I ing choked 'the accumulation ofthe straw or fodder may easily and quickly'be removed. Equally simple is the clearingof the machine when very damp materials are beingtreated because the rollers arefreely, accessible after the removal ofqthe unit? A further advantage of my improved machine is thatthe ma v 40 I v tion of:- a druni- 'cutterinjwhich the stroke of the upper drum is limited by 'rocking'l'evers projvi ded [bemeansgand the machine tween the loading '1 Fig.' 2, a'side-elevation'of'a modified construction of a drum-chad cutter in which the limitation is effected either by a stop uponthe machine framing or byivplvoted levers disposed between the loading me /11 f mdthe' bearing of. th upp r "fi ed rol erg-ji' Vice for the upper. roller,-its guiding arrange-1 ment and means cflecting the l mitation of A ALBEBLT scx zivr n'ajor osm eiaonnenniuiinrlf i i Fi faa further modificationsofa drum; Y

type ehafi cutterinYwhich the limitation is efiecte'dbyadj ustable stops upon the machine mina u Fig. a ga still furthermodification "of a drum chaff {cutter in which spring-controlled rockinglevers serve simultaneously forbade I bearings, j v Fig. "5 anotherymodification correspond ing substantially with that illustratedin Fig. L'butnfona drumichaft" cutter with twin rollers, ana I I Fig.6, a mod disc-type chaff cutter.

'ing and limitingthestroke of the roller i p iication iwitharockingleyer limitingithe stroke ofvthe upper roller for a v r Like parts are indicated like letters of i i Referring tothe a is the training I of the machine; b'the bearing and b the reference throughout allithe figures: ofithe' shaft of the upper feedroller- 6 m the hear- 'ing and m the' shaft of thezlower feed roller 722 The knife cylinder is indicated by the referenceletter t; The drive ofthe rollersb and m and of-the knife cylinder tvis effected in the conventional, manner and has theresfore not ,been shown in'thedrawings. ,7 Referringparticularly Ito Figl lot the drawings it will be'ohs'erved that the loading of the; bearing, b: for the upper I feed roller is. efl'ected-by me'ans ofalever v. This lever is v preferably ,designedas, hood or guard forthe knife, drum,- as shown; The mutualsupport .ofthe'loadinglever rv and'of the bearing of t 1e upper roller-(is here quite free and effected v by a notch e and knife edge 6 By raising the loading leverw thefknife edge" and the notchj areithrown out of engagement; An

- accidentaldisengagement of the said mutual support-Gannottake place because thistendency': is -counteracted by the weight of the loading lever. The lever vmay be further floadedt' by an additional weight a)? or a;pres L "sure-0r-te11s10n.spr ng.= .s

by jaw like members a and-q? of the framing a. If for eonstruetional reas0ns, onei0t the side memberasuch astheJmemher a in Fig. .1, sae d y ry O% the,tipi ger otitlief i Thejbearing b; of th upp rrroller is guided sides of the cutter and which at their lower ends are pivoted on the framing a at c at their upper ends at jaw-like projections o of the loading lever o by means of a transverse rod 0 which connects the pair of levers '0 at their upper ends with each other. l/Vhen thebearing b of the upper roller moves up wards its ascent is limited by the transverse rod 0 In order to prevent the rockin lever 0' from dropping down when the loading lever 4,1 is raised, a pin is is provided in the lever a which is guidedupon a rail or in' a recess i of the machine framing a.

XV hen it is desiredto remove the upper and lower roller units the load is removed from the upper roller by lifting the loading lever 11. The supporting device (notch e and knife edge '6 then. becomes inoperative. The rocking leversc may now be swung sideways to such an extent that the transverse rod .0 is located beyond the reach of'the bearing 6 of the upper roller. -The limiting device as wellas the guiding device are then out of the way and permit the free lifting out of the roller units.

In Fig. 2 of the drawings the guiding standard for the bearing 1) of the upper roller consists at one side of a cheek a provided at the upper end with a nose like stop d for arresting the bearing of the upper roller. The other cheek a is at its top at at recessed in such a way that by swinging the bearing 3) sideways it may be lifted freelyout .of the,

Open guide. In order to prevent the bearing of the upperroller from swinging away from the guide check a accidentallythere is provided a concave notch 0 and convex projection 6 and the curved guide 7 as in Fig. 1. The checks 0 of the lever o are journaled upon pins l? on the machine frame a by means of slots Z. w

In Fig. 3 of the drawings the limiting device consists of a stop al projecting laterally from a lever cZ -ful'crumed to the machine frame a at 6Z3 and which may be swung into or out of the path of the upper -roller hearing Z). I

After relieving the upper roller of its lead by raising the hood 1) the stop nose 5 is swung aside and the rollers may now be lifted out of the machine. I

In the modification illustrated in Fig. i of the drawings the rocking lever serving as limiting device is spring-controlled and at the same time forms the load on the top roller. For this purpose the rocking lever consists of a casing c pivoted to the machine framing a at 0 and a rod 0 slideable within said casing and pivoted at its upper end at c to a handle a. The rod 0 is controlled by a spring 0 which is compressed between a transverse rod y on rod 0 and the top of the casing 0 and thus has the tendency to pull the rod c downwards with a desired 'force. The transverse rod y is adapted to slide in longitudinal slots 0 of the casing 0 The handle .2 is adapted to be swung upwards in the direction .Of the arrow around the pan-like bearing a and is drawn with a knife edge into a notch e of the upper roller bearing Z) under the action of the spring 0 It is obvious that the loading of the top roller as well as the limitation of the movement of the bearing of the roller is effected by-the spring c and by the transverse rod 3 and the slots 0 Fig. 5 of the drawings shows my improvements applied'to a four rollermachine. The two upper roller bearings Z9 and b are connected by bridge-like members 7" and the loading lever o designed as guard or hood for the knife drum is pivoted to rocking levers c at c and supported by means of a knife edgee and a notch e, the knife edge e being provided upon the bridge member 1. The rocking levers c are provided with lateral extensions .9 at their upper ends with which contact the bearings of 'the upper rests with a roller or ball head if in a pan o of the bearing 6 of the upper roller. The limitation of the stroke of the upper roller is'in a similar manner as in Fig. 1 effected by the transverse rod 0 of the rocking levers 0,' which are pivoted to the machine framing a at 0 and by means of the transverse rod Q2 to a'tail o of the loading lever o After raising the leverv o the bearing 6 together with its roller may freely be lifted out of the machine.

Various changes and modifications may be madewithout departing from the spirit of my invention and I desire therefore that u is the chaff cutter wheel of I ing the bearings of saidroller, a loading mechanism for depressing the said bearings,v

and a device for limiting the upward motically reciprocatableupper ieed roller, a

tion of said .bearings,'the standard, loading I j mechanism and limiting device being solocated in relationto each otherthat by ralslng the load moval. a a v 2. In a chaff cutter, in combination, a verthe said bearing is set free for'restandard open at the; topffor guiding the bearings 01": said roller, a loading mechanism for depressing the said bearings in said standard, and means for limiting the ascent of said bearings, said loading mechanism lyin relation to said standard andbeing adapted to be raised, andsaid limiting means consisting of a loading lever supported openbeing adapted to set'freethe said bearings Q after-the raising of the loading lever.

3. In a chaif cutter, in combination, an

' upper feed roller adapted to be raised and lowered, a standardbpen' a-tfi the' top "for guidlng the bearings ofsaid roller, a loading mechanism for holding said bearingsdo'wn in a said standard, and a device for limiting the ing device being adapted to set said bearings ascent of said bearings, said loading mechanism being formed by a safety hood for the knife drum open in relation to said' standard and adapted to be raised, said limits free after the raisingof saidhood.

i. In a chafi cutter, in combination, an

upper feed roller'adapted to be raised and lowered, a standard open at the top for guiding the bearingsoi said roller, a 'loadroller in the operative position of said loading mechanism for saidroller open in relation to said standard and adapted to be raised, and a device for limiting the upward stroke of said roller consisting of a stop adaptedto limit the upward strokelof said ing' mechanism and to set said roller free afterremoval of the load. a r r a ,5. In' a chafi cutter, in combination, :an upper feed roller, astandard open'at the top for guiding the bearings of said roller, a

leading device open in relation to saidstandard and adapted to be raised, and a device i for limiting the'upward stroke of said roller consisting of a movable stop adapted to limit the upward stroke of said bearings when the loading device is in its operative position and to set them free'after the load has been removed from said roller.

6. In a chafi" cutter, in combination, an upper feed roller adapted to be raised and lowered, a standard open at the top for guiding the bearings of said roller, a loadingderice for depressing said hearings in said standard, and a device for limiting the as-, centof saidbearingsin said standard, said a loading device consisting of a lever resting po the upperibearing in the manner of the beam of a pair scales; and acting with one o arm fa sfload and being pivoted at tlie.'.other arm, the'said limiting 1 device, being adapted r-to'set saidbearings"iree after'said' loading a r i V leverfhasibeen raised.

- 7. Ina cha'fi cutter, 'in comb-ination, an

dipper teedrollerfadaptedto beraised' and e- V lowered,a standard 'open'at thetop for guiding the bearings of said roller, a loading. device open in relation to said standard and adapted to be raised, and a device adapted consisting of a rockingstop located in the path of said roller when saidloading'device e is inthe operative position and adapted'to tolimit the upward stroke of said'roller 1 beflmoved Outofthe patter the roller when the load is raised; V a a I 8. In a chafi? cutter, in combination, n upper feed roller adapted to be raised and lowered, a standard open'at the top for guiding, thebearings of said roller, a loading lever for holding said rollerdown resting removably upon saidbearing and pivoted upon a rocking pin, said pivot pin-being. so v arranged that it limits the upward strokeof said heating in the operative position of said loading lever and adapted to be moved out of the limiting position-when said loadinglever is raised;

"9. In a'chafii cutter, in combinatiom'an upper roller adapted toberaisedand lowcred, a standard for the reception of the bearings of said roller open at the top, a loading lever for holding said roller down resting upon the bearing of said roller and adapted to be lifted out of engagement with it, pivoted arinsghinged to the free end of I 'said'lever, the connecting joint being adapt- I ed to limit the ascent of said roller when said loading lever is in the operative position and V to be movedoutof the limiting position when 1 V i v said'loading lever is raisedvoutof engagem i d earing. 1 I

10; In ajchafi cutter, in combination, an a I upper feed} roller adapted to be raised and lowered, astandard forlthe bearingsfof said roller open at the top, a loading lever'for holding said roller down resting removably upon the bearing of'said roller, arms pivoted to the cutterframe' and hinged to the free adapted'to' limitthe ascent of said roller when said loading lever is in the operative posi tion and to be movedout of the limiting p0 sition'when said loading. lever is raised out of engagement-with said bearing.

11. In a chafi cutter, in combination, an upper feed roller adaptedto be raisedand lowered, a standard for the bearings-of said roller open at the top, a scale-beam like loading lever resting uponjthe bearing of said 7 I end of said lever,the connectingjoint beingg:

roller designedat one end as safety hood for.

theknife' drum and hinged at the other end to rocking levers pivoted to the cutter framing, the connectingjoint beingadapted to limit the upward motion of said hearing when said loading lever is in the operative posi tion and to be moved out of the limiting position after the loading lever has been raised out of engagement with said. bearing.

In testimony whereof I have affixed my signature. 

